Across
- 3. the material that forms on earths hard surface
- 5. a great landmass surrounded by oceans
- 6. a deep valley that forms when two plates move apart
- 7. the layer of hot, solid material between the core and the crust
Down
- 1. a scientist who studies the make up and shape of earth
- 2. a layer of rock that forms earths outer surface
- 4. the study of the earth